64820720

素因数分解:

$2^4\times 5^1\times {\mathrm{810259}}^1$

素因数の和:810272

約数の個数: 20

約数和(自身を含む): 150708360

約数和(自身を除く): 85887640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810259, 1620518, 3241036, 4051295, 6482072, 8102590, 12964144, 16205180, 32410360, 64820720]

約数ペア:

[(1, 64820720), (2, 32410360), (4, 16205180), (5, 12964144), (8, 8102590), (10, 6482072), (16, 4051295), (20, 3241036), (40, 1620518), (80, 810259)]